f9a88acbc9
TBR=mvstanton@chromium.org,neis@chromium.org,ahaas@chromium.org Bug: v8:9247 Change-Id: I5433c863a54f3412d73df0d38aba3fdbcfac7ebe Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1627973 Commit-Queue: Yang Guo <yangguo@chromium.org> Auto-Submit: Yang Guo <yangguo@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#61830}
81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <set>
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#include "src/init/v8.h"
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#include "src/objects/objects-inl.h"
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#include "src/objects/smi.h"
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#include "test/cctest/cctest.h"
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namespace v8 {
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namespace internal {
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namespace {
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void AddSigned(std::set<Smi>& smis, int64_t x) {
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if (!Smi::IsValid(x)) return;
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smis.insert(Smi::FromInt(static_cast<int>(x)));
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smis.insert(Smi::FromInt(static_cast<int>(-x)));
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}
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// Uses std::lexicographical_compare twice to convert the result to -1, 0 or 1.
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int ExpectedCompareResult(Smi a, Smi b) {
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std::string str_a = std::to_string(a.value());
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std::string str_b = std::to_string(b.value());
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bool expected_a_lt_b = std::lexicographical_compare(
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str_a.begin(), str_a.end(), str_b.begin(), str_b.end());
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bool expected_b_lt_a = std::lexicographical_compare(
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str_b.begin(), str_b.end(), str_a.begin(), str_a.end());
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if (!expected_a_lt_b && !expected_b_lt_a) {
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return 0;
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} else if (expected_a_lt_b) {
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return -1;
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} else {
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CHECK(expected_b_lt_a);
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return 1;
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}
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}
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bool Test(Isolate* isolate, Smi a, Smi b) {
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int actual = Smi(Smi::LexicographicCompare(isolate, a, b)).value();
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int expected = ExpectedCompareResult(a, b);
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return actual == expected;
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}
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} // namespace
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TEST(TestSmiLexicographicCompare) {
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Isolate* isolate = CcTest::InitIsolateOnce();
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HandleScope scope(isolate);
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std::set<Smi> smis;
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for (int64_t xb = 1; xb <= Smi::kMaxValue; xb *= 10) {
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for (int64_t xf = 0; xf <= 9; ++xf) {
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for (int64_t xo = -1; xo <= 1; ++xo) {
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AddSigned(smis, xb * xf + xo);
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}
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}
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}
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for (int64_t yb = 1; yb <= Smi::kMaxValue; yb *= 2) {
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for (int64_t yo = -2; yo <= 2; ++yo) {
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AddSigned(smis, yb + yo);
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}
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}
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for (Smi a : smis) {
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for (Smi b : smis) {
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CHECK(Test(isolate, a, b));
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}
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}
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}
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} // namespace internal
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} // namespace v8
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